Andrew j



(No Model.) A. J. MARTIN & L. HEATH.

GHANGEABLB SPEED GEARING.

No. 432,418. Patented July 15, 1890.

lllllilillIIIHIIHIIIIIIIIIII I i UNITED STATES 'PATENT OFFICE.

ANDREW J. MARTIN AND LAVRENCE HEATH, OF MACEDON, NEV YORK, ASSIGNORS TO.RICKFORD & HUFFMAN, OF SAME PLACE.

CHANGEABLE-SPEED GEARING-l SPECIFICATION forming part of Letters PatentNo. 482,418, dated July 15, 1890.

Application iiled May 20, 1890. Serial No. 352,544. (No model.)

To all whom it may concern: stood, stands normally at rest. Vithin the pBe it known that we, ANDREW J. MARTIN casing, fixed rigidly on the axle,is a pinion and LAWRENCE HEATH, of Macedon, in the C, which engages aninternally-toothed gear county of Wayne and State of New York, have orring D, mounted to revolve in a seat or invented certain Improvements inChangecavity on one side of the casing B. It will be 55 able-SpeedGearing, of which the following is observed that this internal gear D iseccena specification. tric to the driving-pinion C, by which it isOurinvention relates to an adjustable gearconstantly rotated at arelatively low speed. ing by-which various speeds may be trans- Theinternal gear D is formed integral with Io mitted to a driven pinionfrom a pinion havor attached firmly to the side of a spur-pin- 6o ing aconstant rate of speed. It has referion E, located within the casing` B,and enence more particularly to that type of gearing gaging a seriesofpinions F F F2, dac., which which is represented in Letters Patent ofthe are of different diameters, so that they are United States grantedto Albert Armitage rotated in different times, The entire series I5 JulyG, 1886, No. 345,018, and. to Kirkpatrick ot pinions F,F,&c., aremounted on journals 65 and Martin, February 15, 1887, No. 357,834. inthe casing B, and are permanently engaged The principal object of theinvention is to wit-l1 the driving-pinion E, so that they are secure avery slow Inotion of the driven pinall driven constantly thereby,although but ion when required; and to this end it consists one at atime is in use. Each of the pinions zo in combining with the maindriving-pinion has its journal extended or exposed through 7o and theseries of pinions of different diameone side of the casing, in order toreceive an ters grouped around the same and mounted external pinion G,which is applied to that in a revoluble support, so that either one ofparticular inside pinion which is for the time said pinions may bebrought into operative being in use. The manner of connecting thisposition, as heretofore, an internal gear and pinion Gwith the insidepinion is not ofthe es- 75 a pinion acting therein as the prime Inover.sence of our invention. The two` parts may In the accompanying drawings,Figure 1 is have hubs arranged to interlock, as shown in a sideelevation of our improved gear mechthe drawings, combined with a centralpin g, anism as it appears When applied to the frame to maintain theiraction, or they Inay be othof a grain-drill, for which it is mainlyinerwise constructed. 8o tended. Fig. 2 is a side view of the gear- In asuitable bearing on the frame of the train, the side of the casing beingremoved to machine we mount a pinion I to communicate expose theinternal parts. Fig. 3 is a crossmotion to the seed mechanism or othermechsectio'n on the line 3 3 of Figs. 1 and 2. anism to be finallydriven. By revolving the Referring to the drawings, A represents gearcasing or shell B the external pinion G, 85 the Central driving shaft oraxle, which may when applied to either one of the internal be mounted inxed bearings of any suitable pinions, may be brought into engagementcharacter. Vhen used in a grain-drill, the with the fixed pinion I. mainground-wheels are usually attached di- The operation is as follows: Arotary mo- 4o rectly to this axle to drive the same. tion being impartedfrom any suitable source 9:

B represents a hollow disklike easingv to the shaft A, the pinion C isrevolved theremounted to rotate around the axle and prowith and .impartsin turn a constant but vided at its outer edge with a series ot notchesslower rotation to the internal gear D and its b, adapted to be engagedby a projection on attached pinion E. The pinion E in turn thespring-latch b', fixed to the Inain frame communicates mot-ion to thepinions F F', &c. 95 or other support, so that the casing may be One ot'the last-named pinions is connected revolved at will to bring one oranother'ot' for the time being with the external pinion these pinionsinto action, as hereinafter ex- G, which in turn communicates motion tothe plained, and locked in the required position tinal pinion I. -Suchof the pinions F F,&c.,

5o by the latch. This casing, it is to be underas are not connected tothe pinion G reroo volvo idly on their bearings, but perform no laborand are subject to no material Wear or friction. Asi-the respectivepinions F F F2, the., revolve at diierent rates of speed, it followsthat the inal pinion I is driven at a higher or lower rate of speed,according as the pinion G is connected to one or another of the internalpinions. le prefer to sustain the internal pinions F F', the., by meansof studs or journals a', formed on the inner Wall of the case, tosustain the spur-pinion E on a stud a on the opposite Wall of the ease,and to give the pinion C a peripheral bearing within the case, as shown;but it is to be understood that their pivotal supports may be of anysuitable form and arrangement, provided the parts occupy the relationsherein described andare adapted to receive the adjustments set forth.

Having thus described our invention, what 1. In combination with therotatable casing, the variant pinions mounted therein, the ecnter pinionwith Which they engage, the internal `rear attached to the centerpinion, and the primary driving-pinion engaging the internal gear.

2. The driving-shaft and its pinion and the shell or Casingl mounted torevolve around said shaft, in combination with the variant pinionsmounted therein, and a pinion engaging all the variant pinions anddriven by an intermediate gear from the pinion on the main shaft.

In testimony whereof We have hereunto set our hands, this 1st day ofMay, 1890, in the presence of two attesting witnesses.

ANDREW J. `llI/YXR'llN. LAWRENCE HEATH. Witnesses:

W. L. ACKER, G. W. KIRKPATRICK.

